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COVER INFORMATION

Station: PARKES (Code Pa )
Experiment: 6.5 GHz 64 MHz from DAS disk-based recorders test
Exp. Code: vt001i


Schedule Version: 1.00
Processed by SCHED version: Release of 18 Sept. 2003

PI: Steven Tingay

Address: Swinburne University of Technology
Mail number 31
P.O. Box 218, Hawthorn, Victoria 3122, Australia


Phone: +61-03-92148758
EMAIL: stingay@astro.swin.edu.au
Fax: +61-03-92148797
Phone during observation:

Observing mode: LBA, 6.5 GHz continuum

Notes:
Fringe finders: 2255-282



Schedule for PARKES (Code Pa ) Page 2
6.5 GHz 64 MHz from DAS disk-based recorders test
UP: D => Below limits; H => Below horizon mask. blank => Up.
Early: Seconds between end of slew and start. Dwell: On source seconds.
Tapes: Drive, Index, Start footage / Direction, Head Group, End footage.
TPStart: Tape motion start time. Frequencies are LO sum (band edge).
----------------------------------------------------------------------------------------
Start UT Source Start / Stop Early Tapes TPStart
Stop UT LST EL AZ HA UP ParA Dwell (see above)
----------------------------------------------------------------------------------------

--- Wed 17 Nov 2004 Day 322 ---

Next scan frequencies: 6500.00 6516.00
Next BBC frequencies: 2000.00 2016.00
Next scan bandwidths: 16.00 16.00

07 00 00 2255-282 20 39 46 59.9 89.7 -2.3 -108.3 0 1 1 52 07 00 00
10 00 00 --- 23 40 16 79.7 -63.5 0.7 121.8 10800 F 1 3832


SETUP FILE INFORMATION:
NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings.


Setup file: lba6.5GHz-1p-2IF.set
Matches group pa4cm in /nfs/atapplic/vlbi/sched/catalogs/freq.dat

Setup group: 3 Station: PARKES Total bit rate: 128
Format: S2 Bits per sample: 2 Sample rate: 32.000
Number of channels: 2 Passes/head pos: 1 Speedup factor: 1.00

Tape speeds: Low density - 6.300 ips, High density - 4.20 ips
Time per pass for 7600 ft, High density tapes is: 06:01:54

1st LO= 4500.00 4500.00
Net SB= U U
Pol. = RCP RCP
BBC = 1 3
BBC SB= U U
IF = A A

The following frequency sets based on this setup were used.

Frequency Set: 3 Setup file default. No pcal detection.
LO sum= 6500.00 6516.00
BBC fr= 2000.00 2016.00
Bandwd= 16.000 16.000

Track assignments are:
track1= 0, 0
barrel=roll_off
 SOURCE LIST -- 6.5 GHz 64 MHz from DAS disk-based recorders test
Catalog positions marked with *.
Precession of date coordinates is based on stop time of first scan.
Names used in schedule marked with *.
Short names used in VLA and SNAP files marked with +.
Observation date used in B1950/J2000 coordinate conversion (PRECDATE): 1979.900
No adjustments are made for rates (DRA, DDEC).

Source Source position (RA/Dec)
(B1950) (J2000) (Date)

* 2255-282 22 55 22.460567 * 22 58 05.962800 22 58 21.944916
-28 14 25.61701 *-27 58 21.25500 -27 56 57.75934
From catalog imbedded in main SCHED input file.



The solar corona can cause unstable phases for sources too close to the Sun.
SCHED provides warnings at individual scans for distances less than 10 degrees.
The distance from the Sun to each source in this schedule is:
Source Sun distance (deg)
2255-282 98.8

Barry Clark estimates from predictions by Ketan Desai of IPM scattering sizes
that the Sun will cause amplitude reductions on the longest VLBA baselines
at a solar distance of 60deg F^(-0.6) where F is in GHz.
For common VLBI bands, this is:
327 MHz 117. deg
610 MHz 81. deg
1.6 GHz 45. deg
2.3 GHz 36. deg
5.0 GHz 23. deg
8.4 GHz 17. deg
15.0 GHz 12. deg
22.0 GHz 9. deg
43.0 GHz 6. deg